Heat oil in a pan.
Add mustard seeds and once they pop, add urad dal and fenugreek seeds.
When the urad dal begins to brown, add the thalippu vadagam and fry for 30 secs
Add curry leaves and shallots next.
Fry till shallots turn pink and translucent
Add the cluster beans next and mix well.
Fry for 3 to 4 mins on medium flame.
Once done, add turmeric powder and sambar powder,mix well and fry for 20 secs
Add tamarind extract along with salt and jaggery.
Simmer till raw smell of the tamarind goes away and the kuzhambu thickens considerably.
Serve hot with rice.